Simple past tense and past participle of kerf.(verb)
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Use "kerfed" in a sentence
"In Mosul, which is kerfed almost in half by the Tigris River, Arabs mounted red, white, and black Iraqi flags on street corners and rooftops on the west bank; on the east bank, Kurds flew their yellow colors from storefronts and Russian-made jeeps."
"The square box had been made from a single plank, bent around kerfed grooves that had been cut not quite all the way through for three of the corners; it was fastened together with pegs at the fourth."
"I would like to make the guess that the back separation and kerfed lining issues cause the bigger price cut."